Expansion Tank SizingExcel

Protect freeze-sensitive above-ground backflow protection devices with these rugged insulated enclosures. Drain openings in enclosure base accommodate maximum RPZ discharge for valve sizes indicated. Drain ports are protected from wind, debris and animals with screen wire and flap. Heated models maintain 40°F temperature even when outside temperatures fall to -30°F and with winds up to 15 mph.

Expansion tank sizingcalculator metric

Custom enclosure options include: enclosures for up to 10" pipe size, custom colors, decorative rock or smooth fiberglass designs. Contact USABlueBook for details.

Custom enclosure options include: enclosures for up to 10" pipe size, custom colors, decorative rock or smooth fiberglass designs. Contact USABlueBook for details.

Expansion tank sizingChart

Size an horizontal expansion tank for hot oil system using Therminol VP-1 as thermic fluid. Fluid is heated from 30 °C to 350 °C. System hot oil volume is 7.87 m³. L/D to be used as 2.5. Thermic fluid density is 1056 Kg/m³ at 30 °C and 761 Kg/m³ at 350 °C.

Protect freeze-sensitive above-ground backflow protection devices with these rugged insulated enclosures. Drain openings in enclosure base accommodate maximum RPZ discharge for valve sizes indicated. Drain ports are protected from wind, debris and animals with screen wire and flap. Heated models maintain 40°F temperature even when outside temperatures fall to -30°F and with winds up to 15 mph.

A minimum volume (10% ~ 20%) is considered in expansion tank at start-up in cold conditions. As heating is started volume expands and tank sizing should be such that expanded volume fills (70% ~ 80%) of tank volume.

Enclosures feature flanged bases that can be anchored to a 4" thick concrete pad. For quicker and easier installation, use one of the optional prefabricated fiberglass mounting bases. They extend 2" above grade and 2" below grade and are anchored in place with backfill that covers a continuous lip extending from the bottom of the base. All bases include hardware that secures the base to the BFP piping.

Expansion tank sizingcalculator

Enclosures feature flanged bases that can be anchored to a 4" thick concrete pad. For quicker and easier installation, use one of the optional prefabricated fiberglass mounting bases. They extend 2" above grade and 2" below grade and are anchored in place with backfill that covers a continuous lip extending from the bottom of the base. All bases include hardware that secures the base to the BFP piping.

Expansion tank is provided in hot oil system to accommodate for the increased thermic fluid volume due to thermal expansion. It also helps in removal of moisture and non-condensables during start-up. This article will show how to do sizing of an expansion tank.